Antiskid device



N. E. HEIL ANTISKID DEVICE May 5,1931.

Filed Feb. 2, 1928 12 02 122072 EIRJZ M awowmz Patented May 5, 1931 PATENT OFFICE NORMAN E. HEIL, OF IPATERSON, NEW JERSEY amsxrn nEvrcE Applicationfiled February 2, 1928. Serial No. 251,381.

It is the purpose of the present invention to provide a non-metallic anti-skid attachment for vehicle wheels, with a view of eliminating all possible injury to the tire that usually results from the-use of chains and analogous devices, as well as obviate the trouble and difficulty attending the breaking of a chain, and the noise incident to the latter hitting against the adjacent mud guard as the wheel rotates. Then again broken chains usually result in the loss of links which. lie in the highway causing punctures and cutting of tires of other vehicles.

Therefore, one of the chiefcharacteristics of the present invention resides in the provision of an anti-skid attachment in the nature of a flexible strap of woven fabric having an effective ground engaging surface to prevent skidding of the vehicle without in any way injuring the tire.

In carrying out the invention I comprehend the provision of an anti-skid attachment constructedof woven fabric of any desired width and thickness, the opposed faces of which are substantially corrugated, to permit the attachment to be reversed, either face being designed to obtain an effective purchase on the ground to prevent skidding.

More specifically stated, the invention contemplates a device of the character mentioned, wherein each face is formed with alternately disposed spaced parallel ridges extending transversely of the attachment to provide an "elfective anti-skid surface.

An important object of the invention resides in the fact that the fabric is so woven, that each ply is formed with the above mentioned alternately disposed ridges, so that when the ridges of the outer ply wear down, the ridges of the next ply arepresented to the ground, and thus an effective anti-skid surface for the attachment is always maintained.

, A further object of the invention resides in the fact that the warp threads of each ply when worn down through said ridges, only partly effect the warp threads of the adjacent ply, and at the same time only partly 0 effect one half the number of weft threads of said ply, whereby the fabric remains tightly woven throughout the entire life of the attachment.

The nature and advantages of the invention will be better understood when the following detail description is read in connection with the accompanying drawing, the invention residing in the construction, combinationand arrangement of parts as claimed. In the drawing forming part of this application like numerals of reference indicate similar parts in the several views and wherem:

Figure 1 is a fragmentary View showing the application of the invention.

. Figure 2 is a sectional view on line 2.-2 of Figure 1.

Figure 3 is a sectional view on line 3-8 of Figure 5.

Figure 4 is a fragmentary plan view, the threads in the figure being separated to clear- 1y illustrate the weft.

Figure 5 is an enlarged fragmentary view of the attachment.

Referring to the drawing in detail 10 represents a tire carrying rim, the tire being indicated at 11.

The anti-skid attachment comprises the usual side chains 12 which are arrangedat opposite sides of the tire, and with which the anti-skid members are terminally connected.

The anti-skid members indicated generally at 13 are adapted to be passed transversely across the tread of the tire, and each has associated with the ends thereof a suitable fastening 14 whereby the anti-skid members can be attached to the chains 12. However, the fasteners 14 are preferably of the construction illustrated and described in my co-pending application.

Each anti-skid member 13 consists of a narrow fiat strap of woven fabric, which may be of any desired width or thickness without departing from the spirit of the invention. In accordance with the inventive idea, each member 13 has its opposed faces substantially corrugated to provide an effective antiskid surface when contacting the ground or surface, and thus prevent skidding of the machine with which the attachment is used.

In other words, the fabric is so woven that each face of the member 13 is provided with spaced parallel ridges, which ridges are sufficient-ly pronounced to obtain an efl'ective purchase on the ground and thus prevent sln'dding of the machine. The member may be made up of any number of identically constructed plies as clearly illustrated in Figure 3, wherein the warp threads are indicated at 14 and the weft threads at 15. It will be noted upon inspection of this fi re that while the weft threads of the various plies are arranged in vertical alignment, they are staggered horizontally, and the warp threads are so interwoven that each ply is formed with the above mentioned spaced transverse ridges 16. Itis an important feature of the present invention to construct an anti-skid attachment of woven fabric, wherein each ply is provided with the spaced transverse ridges, and arranged so that when the ridges of the outermost ply wear down, the ridges of the next adjacent ply are presented for use, and in this way an effective anti-skidding surface for the attachment is maintained throughout the lift of the latter. It is equally important to provide a construction that will remain tightly woven until the attachment is worn beyond further use, and

it will be noted upon inspection of Figure 3 that the warp and weft threads are so arranged, that when the ridges 16 of the outermost ply are completely worn down, along the line indicated at 17, only a portion of the ridges 18 of the next ply are eflected, While at the same time only approximately onehalf the number of weft threads 15 are ef fected, and in this way the entire structure retains its tightly woven condition until it has served its utility to the fullest extent.

While it is believed that from the foregoing description, the nature and advantages of the invention will be readily apparent, I

desire to have it understood, that I do not limit myself to what is herein shown and described and that such changes may be resorted to when desired as fall within the scope of what is claimed.

What is claimed is:

1. An anti-skid device com rising a narrow flat strap of woven fabric, includinga plurality of identically constructed plies, the warp threads of each ply passing over and under the adjacent weft threads, the weft I threads of each ply being arranged in vertical alignment and staggered horizontally to form each ply with spaced parallel ridges, the ridges of one ply being arranged between the ridges of the adjacent ply to be simultaneously presented to the ground, whereby the ridges of the outermost pl are completely worn while only partly a ecting the corresponding rill es of the adjacent ply incident to the wear 0 the fabric.

' 2. An anti-skid device comprising a narrow strap of woven fabric, including a plurality of indentically constructed plies, the warp threads of each 1y passing over and under the weft threa s thereof, said weft threads throughout the entire thickness of the fabric being arranged in vertical alignment and staggered horizontally forming each ply with spaced parallel ridges, the ridges of one ply partly received between the ridges of the adjacent ply, whereby the ridges of the outer ply and only a portion of the ridges of the adjacent ply are simultaneously presented to the ground for use, so that the ridges of the last mentioned ply are only partly affected when the ridges of the outer ply are completely worn.

In testimony whereof I aflix my signature.

NORMAN E. HEIL. 

